quiz2Ab1

# quiz2Ab1 - Physics 1A 9 AM class Quiz 2 Oct 24 2008 Prof...

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Physics 1A- 9 AM class Quiz # 2 Oct. 24, 2008 Prof. Jose Onuchic MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Figure 1 A projectile is fired at time t = 0.0s, from point 0 at the edge of a cliff, with initial velocity components of n ox = 60 m/s and n oy = 100 m/s. The projectile rises, then falls into the sea at point P. The time of flight of the projectile is 23.0s. 1) In Figure 1, the height H of the cliff is closest to: A) 340 m B) 170 m C) 290 m D) 2590 m E) 2300 m 2) In Figure 1, the horizontal distance D is closest to: 3) A jet airliner moving at 500 mph due east moves into a region where the wind is blowing at 120 mph in a direction 30 o north of east. What is the new velocity and direction of the aircraft? 4) Two blocks of masses 20 kg and 8 kg are connected together by a light string and rest on a frictionless level surface. Attached to the 8-kg mass is another light string, which a person uses to pull both blocks horizontally.

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